Safety-gate for elevators.



H. L. BRAYTON. SAFETY GATE FOR ELEVATORS.

APPLIOATION FILED NOV. 18, 1910.

1,007,428, Patented Oct. 31, 1911.

2 SHEETS-SHEET 1.

' II I H IIHU' I u H WITNESSES:

ATTORNEYS comma PLANOGRAP?! $0.. WASHINGTON. n. c,

H. L. BRAYTON.

SAFETY GATE FOR ELEVATORS.

APPLICATION FILED NOV.18. 1910.

. 1' '7,42 Patented 0013.31, 1911.

2 SHEETS-SHEET 2.

! By M W 4'9 ATTORNEY-S COLUMBIA PLANOGRAFH c0.. WAsmNu'rON. D. c1

INVENTOR HENRY L. BRAYTON, 0F OWOSSO, MICHIGAN.

SAFETY-GATE FOR ELEVATORS.

Specification of Letters Patent.

Patented Oct. 31,1911.

Application filed November 18, 1910. Serial No. 592,994.

ing and closing elevator gates automatically by the movement of the elevator cage or car, and has for its object to provide a sim ple and reliable mechanism of this character which will be located entirely in the elevator shaft, readily accessible in all its parts, and which will not require any countor-weights.

The invention will be fully described hereinafter, and the novel features pointed out in the appended claims.

Reference is to be had to the accompanying drawings forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is a vertical section of the elevator shaft, the car, and the improved gateoperating mechanism; Fig. 2 is a horizontal section thereof; Fig. 3 is a detail view, on an enlarged scale, of certain pulleys and sliding members hereinafter referred to, and Fig. 4 is a detail longitudinal section of the sliding member.

The walls 10 of the elevator shaft are provided with openings 11 adapted to be closed by the gates 12, sliding up and down in suitable guides. The car 13 is connected with any suitable mechanism (such as the cable 14) for raising or lowering it in the elevator shaft. The stationary posts 15 guide the car in its movement. A horizontal bracket or support 16 is secured to one of the guide posts 15 and also to the wall of the shaft. This bracket is formed with a horizontal guideway in which a slide 17 is adapted to travel. To this slide is bolted a crosshead 18 provided with a laterally projected pin 18 on which a pulley or roller 19 is mounted to turn. This roller is adapted to be engaged and forced outward, that is, away from the guide post 15, by a V shaped cam or operating member 20, which is secured to the car 18 by braces 20 A flange 19 prevents contact of the cam with the bracket 16. A rope or other flexible connection 21 has one of its ends secured to the crosshead 18, as by means of a pin 18, and then extends inward, approximately parallel with the guideway, to a pulley 22 journaled' on a bracket 23 secured to the guide post 15. The other end of this rope 21 is secured to, and winds upon, a pulley 2 1 which is journaled in a bracket 25 secured to the support 16. WVith the pulley 241 are connected rigidly two larger pulleys 26 on which ropes or other flexible connections 27 are secured and arranged to wind in the direction opposite to the rope 21. The ropes 27 pass over suit-able guides 28 and are connected with the gates 12. Of course, if there is only one gate at any one of'the floors, oneof the pulleys 26 and its connections would be omitted.

.The. weight of the gates tends to turn the pulleys 26, 24; in such a direction that the slide 17 will be drawn toward the post 15. As the car 13 rises or descends, the inclined face of the operating member 20 will engage the roller 19 and force the crosshead 18 and the slide 17 outward along the guideway of the support 16. Inasmuch as the slide 17 projects in advance of the roller 19 (see Fig. 2), the danger of the slides binding is avoided. The outward movement of the crosshead 18. causes the pulleys 24, 26 to be turned by the pull on the rope 21 in such a direction as to raise the gates 12 by the pull exerted on the ropes 27. WVhen the car 13 moves away from the openings 11, the receding arm 20 will allow the gates 12 to close by gravity. The arrangement of the pulley 22 not only equalizes the strains on the mechanism, but insures an easy motion of the slide 17 by causing the strain theiileon to be substantially in line with its pat Various modifications may be made without departing from the nature of my invention' as set forth inthe appended claims.

Having thus described my invention; I claim as new and desire to secure by Let ters Patent,

1. The combination of an elevator car, an operating member on the car, an elevator shaft, a support located within the shaft and provided with a horizontal guideway, a slide adapted to be shifted along said guideway by the action of said operating member, a pulley adjacent to the inner end of the guideway, another pulley located nearer the outer portion of the shaft, a flexible connection passing around said inner pulley and having one end secured to the slide and its other end winding on the outer pulley respectively, and a gate operatively connected with said outer pulley.

2. The combination, with an elevator car, and an operating member on the car, of an elevator shaft, a pulley journaled at the inner portion of the shaft, a guide extending outwardly from a point adjacent to said pulley, a slide movable along said guide and provided with means adapted to be engaged by said operating member, a pulley near the outer portion of the shaft, a flexible connection extending from the slide around the first pulley, substantially parallel with the slides path, and secured to the second pulley, a gate, and means for operating the gate from the second pulley.

3. The combination, with an elevator car, and an operating member, of an elevator shaft having a guide for said car, a bracket secured to said guide, an inner pulley journaled in the bracket, a support likewise secured to the guide, adjacent to the pulley, and extending outwardly therefrom, a slide movable lengthwise of said support, a crosshead secured to the slide, a roller journaled upon said crosshead at one side, and adapted to be engaged by said operating member, another bracket carried by said support, connected pulleys of different diameters journaled on said last named bracket, a flexible connection extending in contact with the inner pulley and having its ends secured to the crosshead and to the smaller one of the connected pulleys respectively, a gate, and a flexible connection therefrom to the larger one of the connected pulleys.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

J. C. OSBURN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

